Feature Request: /remote should support non-GitHub git repositories (e.g. GitLab, Bitbucket)

[herbeus]

Problem

/remote fails with Remote session disabled: not in a GitHub repository when used in a GitLab (or other) repository.

Proposed Solution

The remote session feature should work independently of the git host — session control via GitHub account, regardless of where the code is hosted.

Use Case

Teams using GitLab want to use /remote to control their Copilot CLI session from GitHub web/mobile, but are blocked by the repository host check.

Additional Context

The CLI is already authenticated via GitHub, so the restriction to GitHub-hosted repos feels unnecessary for the remote control functionality itself.